$US100.47 million is the exact amount that an anonymous buyer -- no, not that lady you see above, she's a Photoshop ghost -- paid for the window-walled apartment, which evens out to about $US90,000 a square metre. The two-storey duplex encompasses 1115 square metres, which is about 3.8 times larger than the average size of a new home in the United States -- not terribly much larger, in relation to the cost. But hey, this mysterious billionaire buyer is getting access to what the Daily News calls "uber luxe" amenities, like a steam room, a theatre, a library and more.

More rich-looking Photoshop ghosts, probably on their way to ghost opera.

Over the past two years, we've been watching a clutch of new residential towers climb skyward along this single block of Midtown Manhattan. a development boom that's not only extraordinary for its prices, but also its heights. One57 is actually the shortest of the new additions, at just over 300m, but then there's 432 Park (426m), 107 West 57th (411m tall and 12m wide) and 225 West 57th St (472m).

So if One57's record-breaking penthouse seems insane, you're going to want to hold onto our butt. Within the next few years, we're going to see many, many more records set -- probably along this single boulevard. Barring a crash, of course. [The Real Deal]